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authorTakashi Iwai <tiwai@suse.de>2016-04-21 16:39:17 +0200
committerTakashi Iwai <tiwai@suse.de>2016-04-26 10:11:11 +0200
commitbb03ed216370cb021f377f923471e56d1de3ff5d (patch)
treef9a8107a8bf7878cd110c358e791cf72a1862f02 /sound/usb
parent037e119738120c1cdc460c6ae33871c3000531f3 (diff)
ALSA: hda - Update BCLK also at hotplug for i915 HSW/BDW
The recent bug report suggests that BCLK setup for i915 HSW/BDW needs to be updated at each HDMI hotplug, not only at initialization and resume. That is, we need to update HSW_EM4 and HSW_EM5 registers at ELD notification, too. Otherwise the HDMI audio may be out of sync and played in a wrong pitch. However, the HDA codec driver has no access to the controller registers, and currently the code managing these registers is in hda_intel.c, i.e. local to the controller driver. For allowing the explicit BCLK update from the codec driver, as in this patch, the former haswell_set_bclk() in hda_intel.c is moved to hdac_i915.c and exposed as snd_hdac_i915_set_bclk(). This is called from both the HDA controller driver and intel_pin_eld_notify() in HDMI codec driver. Along with this change, snd_hdac_get_display_clk() gets dropped as it's no longer used. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91410 Cc: <stable@vger.kernel.org> # v4.5+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
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